论文标题
成对运动学Sunyaev-Zeldovich功率谱的鲁棒性作为宇宙重力探针
Robustness of the pairwise kinematic Sunyaev-Zeldovich power spectrum shape as a cosmological gravity probe
论文作者
论文摘要
我们可以从修饰的重力（MG）星系/光晕模拟目录中证明，成对运动学运动学Sunyaev-Zeldovich（KSZ）功率谱的形状$ P _ {\ rm KSZ} $限制了对界面上不同的重力理论的限制力量。通过将有效的光学深度$τ_{\ rm t} $作为免费参数，我们验证$τ_{\ rm t} $ - $ f $（线性增长率）在$ p _ {\ rm ksz} $线性的线性理论中的变性中的变性是通过非线性和$ flinear $ flinear $ for的，并分为$ flineal in for $ flineal和flineal for。同等地说，单独使用$ p _ {\ rm ksz} $的形状可以用来限制宇宙学量表上的MG理论。我们有很好的了解星系密度偏见，我们验证了下一代CMB和Galaxy Spectroscic Redshift Surveys的组合，例如BOSS+CMB-S4 or DESI+CMB-S4, could potentially discriminate $f(R)$ models from the general relativity at $\sim5σ$ level using the shape of the galaxy pairwise kSZ dipole $P_{{\rm kSZ},\ell=1}$ alone, when $f_{R0}=10^{-4}$.
We prove from the modified gravity (MG) galaxy/halo mock catalogs that the shape of the pairwise kinematic Sunyaev-Zeldovich (kSZ) power spectrum $P_{\rm kSZ}$ has constraining power on discriminating different gravity theories on cosmological scales. By varying the effective optical depth $τ_{\rm T}$ as a free parameter, we verify that the $τ_{\rm T}$-$f$ (the linear growth rate) degeneracy in the linear theory of $P_{\rm kSZ}$ is broken down by the non-linear structure growth and the scale-dependence of $f$ in some MG theories. Equivalently speaking, the shape of $P_{\rm kSZ}$ alone could be used to constrain the MG theories on cosmological scales. With a good knowledge of galaxy density biases, we verify that, a combination of the next generation of CMB and galaxy spectroscopic redshift surveys, e.g. BOSS+CMB-S4 or DESI+CMB-S4, could potentially discriminate $f(R)$ models from the general relativity at $\sim5σ$ level using the shape of the galaxy pairwise kSZ dipole $P_{{\rm kSZ},\ell=1}$ alone, when $f_{R0}=10^{-4}$.
